Here is what Ford has in the workshop manual for the specs for the RDU & PTU. Ford doesn't show any different fluid or procedure for the Tremor.
PTU Fluid spec
RDU Fluid spec
PTU Drain & Fill
2023 Maverick PTU D&F.pdf
RDU Drain & Fill
2023 Maverick RDU D&F.pdf
I see a lot of people asking for a trashcan that works with the FITS system. Ford has a FITS kit that includes a trashcan.
https://accessories.ford.com/products/maverick-2022-ford-integrated-tether-system-fits-package